Glass-drawing apparatus



H. K. HITCHCOCK.

GLASS DRAWING APPARATUS.

APPLICATION FILED OCT. 8, 1917.

Patented Jan. 20, 1920. j'lli 2 SHEETS$HEET s.

INYENTOR.

H. K. HITCHCOCK.

GLASS DRAWlNG APPARATUS.

APPLICATION FILED 0018,1917.

,328,673. Patented Ja11.20,1920.

'2 SHEETS-SHEET 2.

WITNESSES INVENTOR UNITED STATES rn'iinn'rv ornion.

HALBERT K. HITCHCOCK, OF PITTSBURGH, PENNSYLVANIAQASSIGNOR T0 PITTSBURGH PLATE GLASS COMPANY, A CORPORATION OF PENNSYLVANIA.

GLASS-DRAWING APPARATUS.

Application filed October 8, 1917. Serial No. 195,437.'

of an arrangement of combined drawing and take-down apparatus, (1) wherein improved means are provided permitting of a supply of airto the bait without the use of flexible tubing and for guiding and steadyin the bait during the drawing operation, (2%wherein improved means are provided for operatin the drawing means and swinging' the ta re-down apparatus, and (3) wherein improved means are provided for detachably securing the bait to the drawing device. One embodiment of the invention is Illustrated in the accompanying drawings, wherein- Figure 1 is a side elevation of the com-. plete apparatus, the. dot-and-dash lines showing certain of the parts whenthe bait is in lowered position and. also when the frame is in horizontal position; Fig. 2 is a top view of the bait preferably employed; Fig. 3 is a partial side elevation and partial section showing the detachable connection between the bait and the weight employed; Fig. 4 is a front elevation, partially in section, of the upper part of the apparatus in the position illustrated in Fig. 1; and Fig. 5 is a partial bottom view of the apparatus of Referring to the general arrangement of parts as shown in Fig. 1, the numeral 1 indi cates the drawing extension from which the glass cylinders 2 are drawn; 3 is the baitdetachably secured to the weight 4; 5 is the tilting take-down apparatus pivoted upon the axle members 6: 7 is a motor for operating the cable 8 which lifts the bait; 9 is a counterweight; and 10, 10, are a pair of hollow arms bymeans of which air is supplied to the bait during the drawing operation.

The bait is detachably secured to the weight 4 by means of the connection illustrated in detail in Figs. 2 and 3, such connection including a plurality of lugs 11 upon Specification of Tetters Patent. Patented J an. 20, 1920.

the neck of the weight 4, and a slot in the 1 upper portion of the bait with which the vertical grooves 12 communicate. In con necting the bait with the weighte the lugs 11 are caused to pass through the grooves 12 and the bait and weight rotated relatively to secure locking engagement, the upper surface of the lugs being inclined in order to give, atight joint when the parts are moved to locking position. f

Air is supplied through the weight 4 by means, of thepassage 13' branching laterally at its upper end and communicating with the hollow arms 10, such arms having swivel connection with the weight to permit them to turn with'respectthereto. The weight,

in addition to acting as 'a connecting memher, also serves to give the bait its downward movement before commenclng a draw, and

thus overhauls the line 8 by means of which the drawing operation is carried out.

The frame 5 carries at its upper end a pulley wheel 15 and at its lowerend another pulley wheel 16, such latter pulley wheel being pivoted at 17. The operating line or cable 8 passes around these pulleys and also around the pulley 18yt0 the'drum .19 of the operating motor.

The pivotal support 17 of the pulley 16 is placed off-center with respect to the axle member 6 upon which the tilting frame is mounted, thepurpose being to automatically vary the speed of movement of the tilting frame in moving from the position in full lines to the horizontal position indicated in dot-and-dash lines. its upper extreme of movement, the weight 4: takes against a member 20 secured to the top of the frame and further upward move .ment is stopped. When this upward movement of the bait is stopped, the continued application of power from the operat ng line 8 causes the frame to tilt, the operatlng line at the point A acting upon the periphery of the pulley 16 and having a leverage equal constant speed, this increases the speed of tilting of the frame andsuchincrease inspeed continues until the center 17- of the When the bait reaches.

tance B. If the motor isoperating ata the axle 6, after which time the periphery of the pulley-moves'down," thus decreasing the; I distance A. As a result the frame as it approaches its horizontal position,cslowsr up The forego1ng arrangement 1s advantageous slnce a relatively slow starting movement mids undue strain-upon the cylinder,-

and this is also true with respect to-the. con-- eluding movement of the frame where it is desirable to-jwoid, any undueuiheek =The moremapidtmovement at the central portion of ther svaing is esirable sineestime isrsaved at this point. p the reverse movement the counterweight 9 serves to swing the frame to upri t-.peeitian,.-andtthe weight taverhaulstt line and carries: the, baitdown to the positipn: indicated in dot-and-daslt lines,

move in an exact vertical line and steady it as the bait moves up.

What I claim is:

1. In combination in apparatusfor drawing glass articlesirom a bath of molten glass, a tilting take-down frame pivoted at its lower end adjacent the bath of glass, a bait and means for moving it verticallycarried' 1 -hy the frame anlair, supply, and a system of jointed pipes connected thereto and to the bait carried by the trameand maruangedna that theend eonneetecl to the bait iecausedy -to move. substantiallyuyerticallywwith th$ bait throughout. the drawing I movement 'n thereeia-t. A

- 2. Incombination-imapparatus ing glassovlinders from arbath 10f moltene glass, a tiltingttakeedewn frame.piaoted at a at whichatimeitcengagesuthe molten glass, its lower end adjacentethe bath ,oiaglass mi preparatoryto a new drawing operation. l

The counterweight 9 is preferably carried by a pair qii'clwinfll (Fig, 5)randsuehcha1ns are securedtotthesegmentlaxlap 22, sar'that the chamsv-cw'. -onthe pulley members amfllmframe moves to thehorizom tal position indicated :in dot-and-dash lines in Fig. 1. a The relationof the axle support 6 of the frame such with respecttohthe. point oi suspensionaof the counterweight; v9 that the frame will becnoxmally-cmovedato, the itiont indicated inFig. -1,-.;when n0t act upon by the-motorw The hollow armsilflwhich serve to an air to,,the.ba:it are pivotally supported: out the pipesfli', and-24.; The pipes 2i aretpivott'. ally connected attheir lower eudsto the cross-.. heads e25: slidably mounted \iuhthe guidest26r,

carried upon the sides Q-fithe frame. Short,

ipe 27 are pivotallybonneeted the pipe attthe pivotal eonneption29between whicbtaie iswupplierl Air underapressure is provided the bloweriiat. One ofthe. ax e with thabloswer 30 by,\means-o thepipe 3.1 (Fi tb) The hollow axle member-Becommunieates with .a npipe .32aleadinguto the pivotal reonneetien wv The pantogra bran, rangementzatpipesgas abave descri supports t ba hellowamsdflsso that their ends conneetedttmthe; weight Lfollowthe. movee.

torthe pip s,23-and 24,.and a 3 W W wmentsu s the pipes-ilimnd 27,1 these bemg-rthe po1ntstomembel'sfi is hollow and istconnectedv.

es ed aw p atlena s ior the bait, d dqmb we ut bait, acahledior. moving the bait verticallyan air suppsl ice the bait, and a series of-z-s5 Y pivoted mem ens carried brylthe frame with 11119) members. vone of'such memhenatconneetedtovthe bait and with the membersyso arrangedthat the; end of the arm eonnectedto-thabait isrceused --to move. inua tvertieal line throughout, the

drawing operatlom- 1 a 3. In combination-in apparatumfortdraw- Wing glassarticlesetrom ra-bath pf. molten c glass, a-tilting take-down frame tPiXOtQd .at its lower @end adja mt fl e-bath 0f..zlass,-. M bait andr-meansiommoving iti-vertiea ly ear- 7 ried by the=frame,-an air-.supply,.aparal lelo1 L. H gram madeup .of membarorpmotedmgethemvha.

a part ofiwhicharehollowaamd conneetedto nthe air supply and one of which hollowmemwwo hers is plvotally connected. ta, the. bait,. and Ma. pivotal supportffomthe para am om. vthe said heme,- thesaid membersi ingasm,

arrangedthat they eause-thebait torfollow. a vertical line ip itsmp: and downttmovewmfi 4. Int-combinationimapparatus' fondmwv In ing glas anticlestfimm aarbath ref-. molten 1, 1 glass, ,a tilting. take-down irame, a. bait, a t, H pulley on; the. trame am operatingm linefiormno a the bait extending areund .thapul ey meensv ,for stopping-file movement-oiwthei bait, a-t

motor,v and connections for applyingpowqr. from the motor to the pulley, the pulley be 7 Wing ofi center with res eel; to the pointtotuls ,tpivotal support oithe: ame anrlrpoeitienedm. relatively smthat the applieationof-the. mo hive power to, the pulley after. the'up ward. h movementohthe. bait is stopped causes the a etlltlng of ,thetframe, at ,an( increasing (speed; 1.20 ,during the. firstpsxt of such hiltingapd-ab a t welducmg speed'duringthelatter part *qfi such I. H tln-g.v a 5. lncombingtiopin -apparatueg foedra we ing glass avt'wleefrpm a bath of molten glass gas .a tiltingtake-down frame, a bait, stop meansm aa to y w rd m me fis. e am the power of the motor is applied to tilt the lower end adjacent the bath of glass, a bait 10 frame when the bait is stopped and adapted and means for moving it vertically carried to cause such tilting at an increased speed by the frame, an air supply, and a system of during the first part of the tilting and at a jointed arms pivotally connected to the decreased speed during the latter part of frame and to the bait and so arranged such tilting. that the bait is caused to move substantially 15 6. In combination in apparatus for drawvertically during the drawing movement ing glass articles from a bath of molten glass, thereof.

a tilting take-down frame pivoted at its HALBERT K. HITCHCOCK. 

